Longitudinal Study of Urea Cycle Disorders
Trial statusRecruiting
Trial phaseNot listed
Trial typeObservational
Biological sexAll
AgeNot listed
SponsorAndrea Gropman
About this trial
Urea cycle disorders (UCD) are a group of rare inherited metabolism disorders. Infants and children with UCD commonly experience episodes of vomiting, lethargy, and coma. The purpose of this study is to perform a long-term analysis of a large group of individuals with various UCDs. The study will focus on the natural history, disease progression, treatment, and outcome of individuals with UCD.
Eligibility criteria
Qualifiers
Diagnosis of NAGS deficiency, defined as the detection of a pathogenic mutation, and/or decreased (less than 20 % of control) NAGS enzyme activity in liver ,and/or hyperammonemia and first degree relative meets at least one of the criteria for NAGS deficiency
Diagnosis of CPS I deficiency, defined as decreased (less than 20 % of control) CPS I enzyme activity in liver, and/or an identified pathogenic mutation, and/or hyperammonemia and first degree relative meets at least one of the criteria for CPS I deficiency
Diagnosis of OTC deficiency, defined as the identification of a pathogenic mutation, and/or less than 20% of control of OTC activity in the liver, and/or elevated urinary orotate (greater than 20 uM/mM) in a random urine sample or after allopurinol challenge test, and/or hyperammonemia and first degree relative meets at least one of the criteria for OTC deficiency
Diagnosis of AS deficiency (Citrullinemia), defined as a greater than or equal to 10-fold elevation of citrulline in plasma, and/or decreased AS enzyme activity in cultured skin fibroblasts or other appropriate tissue, and/or identification of a pathogenic mutation in the AS gene, and/or hyperammonemia and first degree relative meets at least one of the criteria for AS Deficiency
Disqualifiers
Hyperammonemia caused by an organic academia, lysinuric protein intolerance, mitochondrial disorder, congenital lactic academia, fatty acid oxidation defects, or primary liver disease
Rare and unrelated comorbidities (e.g., Down's syndrome, intraventricular hemorrhage in the newborn period, and extreme prematurity)
Trial design
Treatments tested in this trial
- Not listed
Trial groups
No trial groups listed
Locations
15Canada
The Hospital for Sick ChildrenM5G 1X8, TorontoOntario, Canada
Germany
University of Heidelberg Heidelberg Germany
Switzerland
University Children's HospitalCH-8032, Zurich Switzerland
United States
California
University of California, Los Angeles90095, Los Angeles United States
Sponsors and collaborators
Andrea Gropman
Lead sponsor
Children's National Research Institute
Sponsor institution
National Center for Research Resources (NCRR)
Collaborator
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Collaborator
Rare Diseases Clinical Research Network
Collaborator
Source ClinicalTrials.gov